Mrs. dimas has $130 to buy basketballs . how many can she buy at $15 each? interpret the remainder.

So what we are looking at is 130 / 15 
which is:
      ___
15 |130

15 goes in to 130  8 times
8 times 15 = 120
130 - 120 = 10
ANSWER: She can buy 8 basketballs
                  The remainder is 10

(-14+3/2b) - (1+8/2b) = -5 -5/2b(-10+b) + (7b-5) = 8b-15(7/2b-3) - (8+6b) = -5/2b-11(5+2b) + (2b+3/2) = 4b+ 13/2